DURHAM, N.C. -- Classifying kangaroos and platypuses together on the evolutionary family tree is as absurd as adding your neighbors to your own family ancestral line simply because they share your ...

To biologists, a "species" is the fundamental unit of categorization for life on Earth and a key tool for protecting living creatures. When you purchase through links on our site, we may earn an ...

A HEARTY welcome may be accorded to the work referred to below, which contains a well-elaborated and highly philosophical digest of the present state of our knowledge of the past history and ...